libcxx/test/std/containers/sequences/forwardlist/empty.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <forward_list>
  10
  11 // class forward_list
  12
  13 // bool empty() const noexcept;
  14
  15 #include <forward_list>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "min_allocator.h"
  20
  21 int main(int, char**)
  22 {
  23     {
  24     typedef std::forward_list<int> C;
  25     C c;
  26     ASSERT_NOEXCEPT(c.empty());
  27     assert(c.empty());
  28     c.push_front(C::value_type(1));
  29     assert(!c.empty());
  30     c.clear();
  31     assert(c.empty());
  32     }
  33 #if TEST_STD_VER >= 11
  34     {
  35     typedef std::forward_list<int, min_allocator<int>> C;
  36     C c;
  37     ASSERT_NOEXCEPT(c.empty());
  38     assert(c.empty());
  39     c.push_front(C::value_type(1));
  40     assert(!c.empty());
  41     c.clear();
  42     assert(c.empty());
  43     }
  44 #endif
  45
  46   return 0;
  47 }